template specialization for arrays

[Timon Gehr]

This works too:

void abc(T, U=void)(T parm1) {
     writeln("simpleparm: ", parm1);
}

void abc(T:U[],U)(T parm1) {
     writeln("array : ", parm1);
}


void main(string[] args) {
     abc(1);
     abc("str");
     int[] arr = [1, 2];
     abc(arr);
}